It is possible to get more information by turning on the debug logging mode.
Step-by-step guide
Turning on debug mode
To turn on the debugging mode,
Go to Settings > System > Logging and profiling
Scroll down to the Default Loggers section and click on Configure
Add the Package name of the plugin and set it's Logging Level to DEBUG
Turning off debug mode
You may turn off the debug logging after you replicated the steps by
- Go back to Logging and profiling and look for the package name in the list
- Click on the OFF in the Set Logging Level to disable the logging
Getting the log files
The logs are written to a file called atlassian-jira.log which in located in the JIRA Home directory.
If you are unsure of the location, you can find it from the System Info page
- Go to Settings > System > System Info, under File Paths section, check out